Derivative Instruments and Hedging Activities, Pre-Tax Effects of Derivative Instruments on AOCL and Income (Details) - Interest Rate Swaps [Member] - Cash Flow Hedging [Member] $ in Thousands	12 Months Ended
Jul. 30, 2021 USD ($)
Interest Rate Cash Flow Hedges [Abstract]
Amount of income recognized in AOCL on derivatives (effective portion)	$ 27,110
Interest Expense [Member]
Interest Rate Cash Flow Hedges [Abstract]
Amount of loss reclassified from AOCL into income (effective portion)	$ 25,420

Amount of unrealized gain (loss) related to the increase or decrease in fair value of interest rate derivatives designated as cash flow hedging instruments, which was recorded in accumulated other comprehensive income to the extent that the cash flow hedge was determined to be effective.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-4C

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration